Write-once information recording medium and disk apparatus
US7885173B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 29, 2009 |
| Grant date | Feb 8, 2011 |
| Priority date | — |
| Expiry date | Aug 2, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/259
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
According to one embodiment, a write-once information recording medium includes a transparent resin substrate having concentric or spiral grooves and lands, and a recording film formed on the grooves and lands of the transparent resin substrate, wherein the recording film includes an organic dye layer containing a metal complex monomer and a metal complex polymer, a recording mark is formed in the organic dye layer by emission of a short-wavelength laser beam, and a light reflectance of the recording mark formed by emission of the short-wavelength laser beam is higher than that before emission of the short-wavelength laser beam, and the grooves wobble within a predetermined amplitude range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.